1668703507 has 2 divisors, whose sum is σ = 1668703508. Its totient is φ = 1668703506.

The previous prime is 1668703483. The next prime is 1668703573. The reversal of 1668703507 is 7053078661.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1668703507 - 2²³ = 1660314899 is a prime.

It is not a weakly prime, because it can be changed into another prime (1668703577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 834351753 + 834351754.

It is an arithmetic number, because the mean of its divisors is an integer number (834351754).

Almost surely, 2^1668703507 is an apocalyptic number.

1668703507 is a deficient number, since it is larger than the sum of its proper divisors (1).

1668703507 is an equidigital number, since it uses as much as digits as its factorization.

1668703507 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 211680, while the sum is 43.

The square root of 1668703507 is about 40849.7675268783. The cubic root of 1668703507 is about 1186.1138931258.

The spelling of 1668703507 in words is "one billion, six hundred sixty-eight million, seven hundred three thousand, five hundred seven".